Piano-stool



(NoModel) A J. D. CLAY.

PIAN() STOOL. No. 585,839. Patented July 6 fw h.

llNrTEn STATES PATENT OFFICE.

JOSEPH DEIVITT CLAY, OF I-IARRISBURG, PENNSYLVANIA.

PIANO-STOOL.

, SPECIFICATION forming part of Letters Patent No. 585,839, dated July 6, 189'?.

Application led March 10J 1897. Serial No. 626,812. (No model.)

T0 all whom t may concern:

Be it known that I, JOSEPH Dnwrrr CLAY, a citizen of the United States, residing at Harrisburg, in the county of Dauphin and State of Pennsylvania, have invented certain new and useful Improvements in Piano-Stools; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to piano-stools; and the object of the invention is to provide a stool of this character the seat of which may be easily and quickly adj usted to any height to suit the convenience of the user, and a further objeet is to provide simple, durable, and inexpensive means for accomplishing this result.

Vith these objects in view the invention. consists of certain features of construction and combination of parts, which will be hereinafter fully described and claimed.

In the accompanying drawings, Figure l is a perspective View of a piano-stool embodying my invention. Fig. 2 is a vertical sectional view, and Fig. 3 is a detail perspective view of the clamp-casing and clamps removed from the stool-support.

In the drawings, ldenotes a tubular stoolsupport which may be provided with the ordinary supporting-legs 2.

3 denotes the supporting-stem, and 4 denotes the seat. Y

The upper end of the stool-support has secured to it a clamp-casing which consists of a casting 5, having a central opening (i for the supporting-stem and side openings 7 intersecting said central opening. In the side openings are pivoted two clamping-levers 8, portions of which move into the central opening of the casing and are beveled on their under faces to allow of an easy upward movement of the stem, which is provided with a series of annular collars 9, which taper downwardly. The outer ends of these clampin g-levers are formed with handles which have arranged between them and secured to the periphery of the casing a spring 10, the stress of which is exerted to keep the levers in engagement with the collars formed on the stem.

If it is desired to raise the seat portion of thestool, the levers need not be operated, but by simply lifting upwardly on the seat por` tion it may be raised to the desired height and will have a free rotary motion without changing its vertical adjustment, as is common in the stools using the ordinary screw stems.

When it is desired to lower the stool7 by grasping the outer ends of the clampin g-levers and pressing them toward each other the said levers will be disengaged from the annular collars of the supporting-stein and the said seat and stem may be lowered to the desired point, where they are held by releasing the clamping-levers.

Although I have described my invention as being applied to a piano-stool, it is evident that by slight changes in construction it may be used in connection with an office-stool or with an ordinary revolving oflice-chair, and hence I do not Wish to be restricted in its application to a piano-stool.

Having thus described my invention what .I claim,4 and desire to secure by Letters Paterture of the clamp-casing into the tubular support, and be held in vertical adjustment by the clamps, substantially as set forth.

In testimony 'whereof I hereunto affix my signature in presence of two witnesses.

JOSEPH DEWITT CLAY.

f Witnesses:

E. O. OUNKLE, J. H. SHAEFFER. 

